Motor protector and speed accelerator



3 H. c. PITTMAN 1,875,652

MOTOR PROTECTOR AND SPEED ACCELERATOR Filed Jan. 12. 1951 gwoentoz Pd .4. H. 6. P/ rrnnu:

a, 5%: /d I W Patented Sept.

HARRY C. PIT'IIAN, OI RICHMOND; INDIANA IO'I'OB PBDTEC'IOB AND SPEED ACCELERATOR Application filed Ianuary 12, 1931. Serial No. 508,150.

The objects of this invention, broadly speaking, are the provision of a motor protector which is simple in construction, requiring no attention for its proper functioning,

easily applied in proper position, which will give a maximum of efiiciency in practice, and which can be manufactured, sold, and installed with a minimum of expense devoted thereto. v

More specifically stated, my object is the provision of means for the protection of motors, or other mechanisms, from adverse weather and atmospheric condition, and from other conditions which may develop.

Another object is the provision of a protector for air craft motors, to decrease the air resistance and thereby permit theair craft to travel more rapidly and with less fuel consumption, in addition to protecting the motor thereof from cold or adverse atmospheric conditions.

Other objects and particular advantages of my invention will be brought out and observed by the usual motor and air craft mechanician in the course of the following description, and that which is new will be pointed out in the appended claim. The best means, to me known at this time, for carrying out the principles of my inven- 30 tion, in a mechanically efiicient and an economical manner, is shown in the accompanying drawing, in which- Figure 1 is a side elevation of the front portion of an air-plane, showing my invenfront end elevation of the same. Figure 3 is a perspective view of the fixed or stationary member of my protector. And Figure 4 is a perspective view of the revolvable or movable member alone.

Similar indices designate like parts throughout the several views, in which the parts which are old, and to which I make no claim. are indicated by letters of reference, and those which are new and form a part of my invention are designated by figures of reference.

In order that the construction, the application thereof to its proximate uses, and the several advantages thereof may be more fully tion in connection therewith. Figure 2 is a,

and clearly understood and appreciated, I will now take up a detail description thereof, inwhich I will set: forth the same as fully and as comprehensively as I may.

Now, takinguvp' a description of my invention as applicable to an aero-plane, or other motorized air vehicle: In thisinstance letter G denotes the forward or nose portion of an air-plane. Mounted in frontof the said nose, and carried thereby, is the circular motor H. Letter I denotes the propeller shaft, which is rotated by said motor, and which turns the blades J, which are secured to a hub, the latter being connected on the shaft I, but is not shown herein.

The relatively stationary, or fixed, portion of myprotector forms a jacket comprising the member 17 which partly incloses the motor H, withits rear portion secured to the front portion ofthe nose G. Forward of the motor H, the member 17 merges into the forwardly taperingmember' 18, which latter is located concentrically with the shaft I, and it in turn merges into the disc 19, with the shaft a erture 20 formed through the center thereo I Located immediately forward of the said rear portion of the protector, is the front portion thereof, which is in the nature of a cone forming a jacket, comprising the conical portion proper, denoted by numeral 21. The for- 30 ward end of said cone portion terminates in the rounded end 22, and the rear end of said cone is closed by the disc 23, which latter has an aperture 24 formed through the center thereof, for the shaft I. a5

- Formed through the central portion of the member 21 are the oppositelydisposed apertures 25, through which the blades J extend.

When the said parts are assembled, as in Fig. 1, for instance, the discs 19 and 23 are 10- e0 cate'd near each other, but no part of the stationary member, shown in Fig. 3, will contact with the rotary member shown in Fig. 4.

It will now be apparent that, with my invention attached thereto, the air-plane may function in the usual manner and without any interference by reason of my attachment.

As the air-plane moves forward it is apparentthat my attachment will protect the motor from direct contact with cold air, but

still permitting the motor to receive the cor rect amount of air for its proper functioning.

Also it will be observe that the shape of my protectorwill enable the air-plane to cut through the air, even with adverse air cur rents, and high winds, with a minimum of air resistance thereto, thereby allowingthe vehicle to travel more rapidly, with less fuel consumption, and with greater safety.

It is to be understood t at various changes may be made in the several details herein set forth without departing from the spirit of the invention or sacrificing any of the advantages thereof which are new and useful.

What I claim is:

In combination with a motor having a shaft extending forwardl therefrom and adapted to be rotated there y and propeller blades carried by the projecting portion of said shaft; a relatively stationary jacket member extending partly around the motor with its forward end forming a disc at right-angles to and concentric with saidshaft, a conlcal jacket member concentric with said shaft and secured thereto with its rear end located near to and corresponding with said disc and with said blades projecting outwardly through said conical acket memben' HARRY c. PITTMAN. 

